Improvement in pipe-tongs



ATTORNEYS s. N. :nssoP;

PIPE-TONGS N o 186 5'75 Pate nt d Jan. 23

WITNESSES UNITED STATES PATENT OFFICE.

SAMUEL N. JESSOP, OF ERIE, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD HIS RIGHT TO RICHARD G. M. HAUPI, OF SAME PLACE.

IMPROVEMENT IN PI PE-TONGS.

Specification forming part of Letters Patent No. I 86,575, dated January 23, 1877; application filed January 6, 1877.

To all whom tt may concern:

Be it known that I, SAMUEL N. JESSOP, of Erie, in the county of Erie and State ofPennsylvania, have invented a new and valuable Improvement in Pipe-Tongs; and 1 do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a side view of the pipe-tongs, part sectional; and Fig. 2 is a bottom view of the bit.

This invention relates to pipewrenches; and it consists in providing one of the jaws of such wrenches with a tubular screw-tapped block for the adjustment of a screw-threaded bit, which may be locked or clamped in any desired position of suchadjustment by means of a pivoted piece carrying a wedge on its free end.

In the accompanying drawings, A and B, respectively,designate the handles of my pipe-wrench, which are pivoted together at a, in the usual manner. Handle Ais provided, beyond said pivot, with a rigidly-attached curved jaw, 0, having a pointed tip, 0,- and handle B is provided, opposite to said jaw, with a rigidly-attached tubular internally screw threaded block, D. E designates a nearly-cylindrical bit, which is provided with screw-threads 0, corresponding with those 011 the inside of tubular block D. Said bit E is also flattened at its sides, as shown ate; and

opposite jaw C, so as to be adapted to grasp pipes of different sizes. Said bit E is locked in any desired adjustment by means of a wedge, F, on the free end of a small arm, F, which is pivoted at its other end to handle B near pivot a. To effect such locking, wedge F is forced in between the flat part e of bit E and the flat side of recess 01', so as to fill said recess and prevent the rotation of said bit. By swinging arm F back on its pivot, the said bit E is unlocked again in readiness for further adjustment. To facilitate this unlocking the base of Wedge F is provided with a small flange or thumb-piece,f.

Either end of said bit may be used for grasping the pipe. One of said ends is provided with an inclined face having a series of ridges, 0 arranged parallel to one another, and across the line of inclination of the same. The other end of said bit is provided with two equal ridges, 6 6 having a cleft between them. When the other end is used for grasping, a screw-driver or other tool may be applied between said ridges e 0 for the purpose of adjusting said bit, as described; or the said bit may be screwed inward and outward by hand.

What I claim as new, and desire to secure by Letters Patent, is-

In a wrench, the combination of tubular internally screw-threaded block D, having recess d, with screw-threaded bit E, flattened at 6 and wedge F, substantially as set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence Witnesses:

JOSHUA NEwBoLD, WILSON LAIRD. 

